/Engine/Source/Runtime/Core/Public/Containers/UnrealString.h
Removes the text from the start of the string if it exists.
true if the prefix was removed, otherwise false.
bool RemoveFromStart ( const [FString](API\Runtime\Core\Containers\FString) & InPrefix, [ESearchCase::Type](API\Runtime\Core\Misc\ESearchCase__Type) SearchCase )